Records show Dale Munroe worked in the emergency department of the hospital's Celebration location since 2006. He was fired in July 2011 for accessing the medical records of Florida Hospital doctor fatally shot in a hospital parking garage last year.

However, after his firing, hospital officials unearthed numerous other examples of inappropriate access to records by Munroe. According to a Federal Bureau of Investigation affidavit, Munroe had accessed over 763,000 patient records between 2009 and the third quarter of 2011. In the same period, a typical employee would access about 12,000.

That included patients at Florida Hospital locations other than Celebration. Fellow employees told federal investigators that it was "extremely rare" for someone in Munroe's role to legitimately need access to records from other locations.

Most of those records were only accessed for a matter of seconds, investigators say. Based on which records Munroe accessed and for how long, officials determined that he was focused primarily on patients who had been in automobile accidents. Of the thousands of patient records Munroe accessed, officials identified more than 12,000 that he inappropriately reviewed in detail.

Some of those patients began receiving phone calls within about a week of their hospital stay from "someone offering them a lawyer or chiropractor referral," records state. The callers knew specifics about accidents and treatment beyond what would be publicly available.

Investigators linked one solicitor to a known agent for "multiple" chiropractic clinics and a local injury hotline. The affidavit states that person, identified as "S.K.," was in contact with Munroe directly by phone and text message.

Authorities say Munroe would access a patient record, then call S.K., who would call someone else "who ultimately contacted the patient to offer the patient a referral for a lawyer or a chiropractor."

The FBI also allegedly unearthed payments from S.K. to Munroe and from S.K.'s wife to Munroe's wife. In an interview with the FBI, Munroe said multiple coworkers had access to the login used to access records. He "could not explain" the inappropriate access, records state.

He explained the some of the payments as loans, the FBI says, and others as compensation for cleaning work his wife did for S.K. However, records state Munroe also told the FBI he was worried about being sexually assaulted in prison and hoped his wife wouldn't "throw him under the bus."

Munroe faces charges of conspiracy to defraud the United States and payment to non-licensed physician.